Commutator for dynamo-electric machines



(No Model.)

G. W. BEARDSLEE.

OOMMUTATOR FOR DYNAMO ELECTRIC MACHINES. No. 264,230. Patented Sept. 12, 1882.

UNITED STATES PATENT OFFIC GEORGE W. BEARDSLEE, OF BROOKLYN, NEW YORK, ASSIGNOR TO IVILLIAM F. JOBBINS, OF EAST ORANGE, NEIV JERSEY. l

COMMUTATOR FOR DYNAMO-ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 264,230, dated September 12, 1882.

Application filed May 29, 1882. (No model.)

To all whom it may concern Be it known that I, GEORGE W. BEARDS- LEE, a citizen of the United States, and a resident of Brooklyn, New York, have invented certain Improvements in Gommutators for Dynamo=Electric Machines or Electric Motors, of which the following is a specification.

My invention consists of certain improvements in the construction of commutators for to dynamo-electric machines or electric motors, the present invention being more particularly applicable to the arrangement of commutators and circuits described in an application for Letters Patent filed by me May 19, 1882, serial No. 61,759.

In the accompanying drawings, Figure 1 is a longitudinal section of the commutatorwheels mounted on a shaft 5 Fig. 2, a perspective view of two adjoining wheels detached from the shaft; Fig. 3, a perspective view of the several segments of a wheel detached, and Fig. 4 a face view of one of the segments.

In Fig. 1, B B A A are the commutatorwheels, which are mounted on a sleeve, S, on 2 5 the shaft S of the armature of the machine. The wheels are secured on the sleeve between a shoulder, s, at one end and a screw-nut, T, at the other, being insulated from each other by washers 1 2 3, and from the shoulder and nut at opposite ends by washers 4 and 5, while insulating-bushes in each wheel insulate the metallic portions of the wheel from the sleeve and shaft; or the wheels may be mounted on an insulating-sleeve. Each wheel may be provided with two or more segments, there being four in the present instance, and each segment a,b,c,ordof the wheelA,for example, has to be electrically connected with the corresponding opposite segment, a, b, c, or cl, of the wheel A. In the machine described in my said application this was accomplished by means of wires running through the wheels and secured by suitable screws to all the segments; butin the present device this is avoided, so that it is only necessary to run four of the armature terminal wires to the segments of the wheel B and the other four terminals to the segments of the wheel A, the connections between the segments of each pair of wheels being made 50 by constructing the wheel as follows: Each of the contact-segments of the wheels 13 and A is attached to or forms part of an annular disk,

I), D, D or D Fig. 3, of smaller diameter than the wheel, and provided with an insulating-bushing, f, to fit on the sleeve S. Each 5 segment is so cast with or secured to its disk that when the several disks D D D D are fitted side by side on the sleeve S, with their intervening insulating-washers 6 6, the disks will be within the segments and the periph- 6o cries of the segments a b c d will be in line with each other, so as to form a complete and compact wheel, Fig. 2. Each disk D is provided with a teat, e, diametrically opposite its segment, and on this teat is fixed a pin, E, the 6 5 pin on each disk being of such a length that when the several pieces are fitted together the pins will all extend beyond the face of the wheel to about the same extent as indicated in Figs. 1 and 2. The disks carrying the seg- 7o ments 1) and 0, Fig. 3, have openings g, bushed with insulating material, for the passage of the pins E of the disks carrying the segments ct and d.

The wheels 13 and A may be made up like the wheels 13 and A, except that the pins E are to be omitted; or they may be made in any other convenient way, provided they have insulated segments corresponding to those of the wheels B and A. To each segment of each wheel B and A is secured a projecting springfinger, E, in such a position that when the wheels are fitted on the shaft the several pins on the wheels B and A will be in contact with the spring-fingers E, as shown in Fig. 1, or the segments of the wheels B and A may be so constructed that the pins E will abut directly against the segments themselves when the wheels are in place.

It will be seen that the several parts of the wheels can be readily slipped onto the sleeve one after the other and secured, the only connections required in addition to those formed by the pins being to connect four of the ter minals to the segments of the wheel B and the 9 5 other four terminals to the wheel A, Fig. 1, theselatter terminals being passed through insulated openings at, Fig. 4, in the several disks of the wheels B B.

I claim as my invention- 1. The combination of a commutator-wheel, A, having insulated metallic segments, with a commutator-wheel, A, having segments se- In testimony whereof I have signed my name cured to or forming parts of disks, provided to this specification in the presenee of two subwith pins E, adapted to form electrical conscribing witnesses. tacts with the segments of the wheel A.

5 2. The combination ofaeommutator-wheel, GEO. W. BEARDSLEE.

A, having insulated. segments and spring-fin- 4 gers E, with a commutator-wheel, A, having Witnesses: segments secured to or forming parts of disks, WALTER K. FREEMAN,

provided with pins E, to come into contact with E. F. BARNES. 10 the fingers E. 

